QUINT-PS/24DC/24DC/ 5/CO
105537_en_02
PHOENIX CONTACT
15 / 22
14.4
SFB configuration
Figure 11
Cable lengths
Maximum distance from the source to be supplied and the DC/DC converter (l
1
)
Maximum distance from the source to be supplied and the load (l
2
)
The following parameters are the basis for calculation:
–
Circuit breaker from Siemens, B and C characteristics
(e.
g., B6: 5SY6106-6)
–
B characteristic: electromagnetic tripping of the circuit
breaker at the latest at (5-fold rated current) x
(correction factor 1.2 at 0
Hz) = 6-fold rated current
–
C characteristic: electromagnetic tripping of the circuit
breaker at the latest at (10-fold rated current) x
(correction factor 1.2 at 0
Hz) = 12-fold rated current
–
Ambient temperature: +20
°C
–
The internal resistances of the circuit breakers are
considered.
–
In addition to short circuit current, the relevant power
supply unit supplies half of the nominal current for paths
connected in parallel.
+
-
+
-
+
-
+
-
l
1
l
2
Supp
lyi
n
g
Sou
rce
L
o
ad
D
C
/D
C
Con
ver
t
er
s
Source to be supplied: QUINT-PS/xAC/24DC/10, QUINT-PS/1AC/24DC/10/CO
Cross section [mm²]
0.75
1.0
1.5
2.5
Distance l
1
[m]
7.6
10.1
15.2
25.4
Source to be supplied: battery, 24
V; 3.4
Ah
Cross section [mm²]
0.75
1.0
1.5
2.5
Distance l
1
[m]
5.4
7.2
10.9
18.1
Source to be supplied: battery, 24
V; 7.2
Ah
Cross section [mm²]
0.75
1.0
1.5
2.5
Distance l
1
[m]
7.6
10.1
15.2
25.4
Source to be supplied: battery, 24
V; 12
Ah
Cross section [mm²]
0.75
1.0
1.5
2.5
Distance l
1
[m]
7.6
10.1
15.2
25.4
Source to be supplied: battery, 24
V; 38
Ah
Cross section [mm²]
0.75
1.0
1.5
2.5
Distance l
1
[m]
8.7
11.6
17.4
29.0
Cross section [mm²]
0.75
1.0
1.50
2.50
Distance l
2
with C2 circuit breaker [m]
5
7
11
19
